Investigation of Corrosion Properties of Nano-Composite Coatings of Hydroxyapatite/Barium Titanate/Chitosan Produced by Electrophoretic Deposition on 316L Stainless Steel

In order to better integrate 316 L stainless steel implants, in this study, hydroxyapatite/chitosan (HA/CS) nanocomposite coatings, barium titanate/chitosan (BT/CS), and hydroxyapatite/barium titanate/chitosan (HA/BT/CS) were applied on the mentioned steel via electrophoretic deposition at 10 V for 150 s. Tri-ethanolamine was used as a dispersant to create a stable suspension. The microstructure, the chemical composition, and the phase structure of materials and coatings were investigated by scanning electron microscopy, energy dispersive X-ray, X-ray diffraction, and Fourier transform infrared spectroscopy. In order to investigate the role of BT in the hardness of the coatings, the obtained hardness of each was compared with each other. To investigate the changes made before and after exposure to the simulated body fluid, the topography and roughness of the surface coatings created were investigated by the atomic force microscopy. The corrosion resistance of the coatings was evaluated by the Auto lab machine and in the simulated body fluid. The results of this study showed that increasing the amount of BT on the HA/CS coating increases hardness and the corrosion resistance of coatings in a simulated body fluid.